43040331331 has 4 divisors (see below), whose sum is σ = 43126585000. Its totient is φ = 42954077664.

The previous prime is 43040331329. The next prime is 43040331337. The reversal of 43040331331 is 13313304034.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 13313304034 = 2 ⋅6656652017.

It is a cyclic number.

It is not a de Polignac number, because 43040331331 - 2¹ = 43040331329 is a prime.

It is a super-2 number, since 2×43040331331² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 43040331296 and 43040331305.

It is not an unprimeable number, because it can be changed into a prime (43040331337) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 43126086 + ... + 43127083.

It is an arithmetic number, because the mean of its divisors is an integer number (10781646250).

Almost surely, 2^43040331331 is an apocalyptic number.

43040331331 is a deficient number, since it is larger than the sum of its proper divisors (86253669).

43040331331 is an equidigital number, since it uses as much as digits as its factorization.

43040331331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 86253668.

The product of its (nonzero) digits is 3888, while the sum is 25.

Adding to 43040331331 its reverse (13313304034), we get a palindrome (56353635365).

The spelling of 43040331331 in words is "forty-three billion, forty million, three hundred thirty-one thousand, three hundred thirty-one".